斜視所產生的正常網膜對應(Normal retinal correspondence.NRC)及異常網膜對應(Abnormal retinal correspondence.ARC)的分類

Harmonious ARC

Angle of anomaly is equal to the angle of strabismus and therefore

the subjective angle is zero.

Unharmonious ARC

The subjective angle is not equal to the objective angle of strabismus. The subjective angle is greater than zero but less than the objective angle of strabismus.